Analysis And Application Research Of Real Time Ethernet Protocol Based On Powerlink

All along, fieldbus technology is widely used in industrial control, but with the development of industrial automation, fieldbus technology has been unable to meet the needs of industrial control process, high-speed, high real-time, high uncertainly,high-capacity data transmission. Industrial Ethernet technology has been paid more and more attention in the field of industrial control with the characteristics of high communication speed, strong real-time performance, strong certainty, good openness and strong ability of resource sharing. Powerlink has a very wide range of application prospects in the field of industrial control, with its good performance, strong certainty, open source,no need of any authorization to become the representative of the industrial Ethernet. In this paper, in-depth analysis of real-time Ethernet Powerlink protocol and application, the main contents are as follows:(1) Through the study of the basic knowledge of Powerlink protocol, the research of Powerlink protocol lay a solid foundation for the study.(2) Powerlink protocol supports two modes, namely request/response model(PReq/PRes) and timing based active reporting mode(PRC). In this paper, two modes of implementation mechanism is introduced, by comparing the performances analysis, draw two working modes of the respective advantages and disadvantages, which provides the alternatives for different applications.(3) By setting up the Powerlink communication network, introduces the realization process of the Powerlink protocol in Linux operating system. Based on the Windows operating system to carry out the test of the master-slace station communication, using the Wireshark network diagnostic tool to obtain the network data packets, the contents of the data packet analysis.(4) The Powerlink protocol is applied to the NT300 distributed control system to solve the problem of heavy load and poor real-time performance. This paper introduces the design method of the two gateway of Powerlink protocol, and designs the whole network architecture of the distributed control system on the basis of this.